The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season.

Find the mean number of type A and type B cases in the first 15 weeks of the flu season.
A) Type A: 2,190 Type B: 921
B) Type A: 1,095 Type B: 461
C) Type A: 1,556 Type B: 1,556
D) Type A: 969 Type B: 374

Question

The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season.

Find the mean number of type A and type B cases in the first 15 weeks of the flu season.
A) Type A: 2,190 Type B: 921 
B) Type A: 1,095 Type B: 461 
C) Type A: 1,556 Type B: 1,556 
D) Type A: 969 Type B: 374

Quizplus · Accepted Answer

To find the mean, add up the number of cases and divide by the number of weeks (15). For Type A, the sum is 32,851, divided by 15, gives a mean of 2,190. For Type B, the sum is 13,815, divided by 15, gives a mean of 921. Therefore, the answer is A.

The Following Tables Present the Number of Specimens That Tested